Using this Bosch Torx Security T15H insert bit is easy. First, insert the 1/4 - inch hex shank into your drill, impact driver, or hammer drill/driver's bit holder. Then, align the precision - formed tip with the fastener. Make sure to apply appropriate pressure while using it. As for maintenance, after each use, clean the bit with a dry cloth to remove any debris. Store it in a dry place to prevent rusting. Also, don't use it for applications it's not designed for to avoid damage.